JPH04341879A - Noise insulating structure in impact printer - Google Patents

Abstract

PURPOSE:To reduce a noise by a method wherein in an impact printer of a horizontal paper insertion type, a reflecting board for reflecting a sound is mounted on an impact head on the printing paper insertion side and noise absorbing materials are provided inside the printer. CONSTITUTION:A reflecting board 1 is mounted on an impact dot head 3 for reflecting a sound generated in an impact dot head body. Thereafter, the reflected sound is to be absorbed. This reflecting board 1 is so shaped as to cover the surface of the head 3 extending toward an open part 11, thereby reflecting a sound generated in the head 3 toward the open part 11. For absorbing the reflected sound inside a printer, noise absorbing materials 2 are disposed on the both sides of the printer in the longitudinal travel direction of the head 3, a noise absorbing material 7 for absorbing a sound generated when a printing wire of the head 3 comes into impact with printing paper is provided in the vicinity of the impact part, and noise absorbing materials 8, 9 are provided for absorbing a sound generated toward the open part 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation structure for an impact printer, and more particularly to a sound insulation structure for reducing noise leaking from a paper insertion opening in a horizontal paper insertion type impact printer.

0002

2. Description of the Related Art Conventionally, in impact printers of the horizontal paper insertion type, the printing paper insertion section has an opening facing the operator's side, and there is a problem in that during printing, sound leaks from the opening and generates a large amount of noise. Was. In the prior art, methods such as providing a sound absorbing material near the opening to reduce the sound radiated from the opening as much as possible have been taken to solve this problem.

0003

[Problems to be Solved by the Invention] However, with the conventional technology, only the sound emitted from the opening is reduced, but there is no countermeasure against the sound source, so the absolute value of the sound reaching the opening is large, and as a result, the sound coming from the opening is reduced. Although the sound radiated from the opening was reduced near the opening, no significant noise reduction effect was obtained.

[0004] The present invention solves the above problems.
The purpose of this is to use a reflective plate to reflect the sound traveling toward the opening of the impact dot head, which is one of the sources of noise, and to absorb the sound with the sound-absorbing material installed inside the printer, or to absorb the sound inside the printer. To provide a low-noise impact printer in which the absolute value of the sound reaching the opening is reduced, thereby significantly reducing the sound emitted from the opening.

[0005]

[Means for solving the problem] In order to solve the above problem,
The sound insulation structure of the impact printer of the present invention is a horizontally inserted impact printer, in which a reflecting plate for reflecting sound is provided on the impact dot head toward the printing paper insertion side of the impact printer, and a sound absorbing structure for absorbing the reflected sound. The material is provided inside the impact printer.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be explained below based on illustrated embodiments.

FIG. 1 is a front view showing an embodiment of a horizontal sheet insertion type impact printer according to the present invention, and FIG. 2 is a sectional view taken along section A--A in FIG.

The impact dot head 3 is mounted on a carriage 5 and is guided by a carriage shaft 6 to move left and right to perform printing. In the horizontal paper insertion type impact printer, the printing paper is inserted from the directions of arrows A and B shown in FIG. 2, and is inserted horizontally into the printing section of the impact dot head 3.

FIG. 3 is a front view showing an embodiment of the impact dot head according to the present invention, FIG. 4 is a side view and rear view of FIG. 3, and FIG. 5 is a top view of FIG. 3. In an impact printer, the sound source is the sound emitted by the impact dot head itself, and the impact dot head 3.
Two types of sounds are generated when the printing wire collides with the printing paper. A reflector plate 1 is attached to the impact dot head 3 in order to reflect and absorb the sound emitted by the impact dot head main body, and the sound is transmitted between the claw part a of the reflector plate 1 and the attachment part 10 of the impact dot head 3. As shown in FIG. 4, the reflector 1 is attached to the impact dot head 3. As shown in FIG. As shown in FIG. 5, the reflecting plate 1 is shaped to cover the surface facing the opening 11 of the impact dot head 3, and the reflection plate 1 has a shape that covers the surface facing the opening 11 of the impact dot head 3. designed to reflect sound. Furthermore, sound absorbing materials 2 are installed at both ends of the impact dot head 3 in the left and right direction in order to absorb the reflected sound inside the printer. Furthermore, a sound-absorbing material 7 is installed near the collision part to absorb the sound generated when the printing wire of the impact dot head 3 collides with the printing paper, and a sound-absorbing material 7 is installed in the vicinity of the collision part to absorb the sound directed toward the opening 11. Materials 8 and 9 are installed.

As mentioned above, the impact dot head 3
By reflecting the sound emitted by the main unit so that it does not go directly toward the opening, the reflected sound repeats reflection inside the printer, complicating the sound propagation process and consuming its energy, causing some are the sound absorbing materials 2 and 7 shown in Figure 2.
, 8, and 9, and as a result, most of it is absorbed by the sound absorbing materials 2, 7, 8, and 9. Since the reflected sound is absorbed or weakened as described above, the absolute value of the sound reaching the opening 11 is reduced.

[0011]

As described above, according to the present invention, the sound emitted from the impact dot head body is reflected and absorbed or weakened inside the printer, thereby reducing the sound emitted from the printer opening. This makes it possible to realize a low-noise impact printer.

[Brief explanation of drawings]

FIG. 1 is a front view of an impact printer showing an embodiment of the present invention.

[Fig. 2] Cross section AA in Fig. 1 illustrating an embodiment of the present invention.
FIG.

FIG. 3 is an explanatory diagram illustrating an embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating an embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating an embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a conventional example that does not use the present invention.

[Explanation of symbols]

1...Reflector 2...Sound absorbing material 3...Impact dot head 4...Platen 5... Carriage 6... Carriage axis 7...Sound absorbing material 8...Sound absorbing material 9...Sound absorbing material 10...Reflector mounting part 11... opening a...Reflector claw part A...Arrow indicating paper insertion direction B...Arrow indicating paper insertion direction

Claims (1)

[Claims] 1. In an impact printer of a horizontal paper insertion type, a reflecting plate for reflecting sound to the impact dot head is provided on the printing paper insertion side of the impact printer, and a sound absorbing material for absorbing the reflected sound is provided inside the impact printer. A sound insulation structure for an impact printer, which is characterized by the following.